content: /*
   * Copyright 2014 Akexorcist
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  
  package app.akexorcist.bluetotohspp.library;
  
  import java.util.Set;
  
  import android.annotation.SuppressLint;
  import android.app.Activity;
  import android.bluetooth.BluetoothAdapter;
  import android.bluetooth.BluetoothDevice;
  import android.content.BroadcastReceiver;
  import android.content.Context;
  import android.content.Intent;
  import android.content.IntentFilter;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.View;
  import android.view.Window;
  import android.view.View.OnClickListener;
  import android.widget.AdapterView;
  import android.widget.ArrayAdapter;
  import android.widget.Button;
  import android.widget.ListView;
  import android.widget.TextView;
  import android.widget.AdapterView.OnItemClickListener;
  
  @SuppressLint("NewApi")
  public class DeviceList extends Activity {
      // Debugging
      private static final String TAG = "BluetoothSPP";
      private static final boolean D = true;
  
      // Member fields
      private BluetoothAdapter mBtAdapter;
      private ArrayAdapter<String> mPairedDevicesArrayAdapter;
      private Set<BluetoothDevice> pairedDevices;
      private Button scanButton;
  
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          
          // Setup the window
          requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
          int listId = getIntent().getIntExtra("layout_list", R.layout.device_list);
          setContentView(listId);
          
          String strBluetoothDevices = getIntent().getStringExtra("bluetooth_devices");
          if(strBluetoothDevices == null) 
          	strBluetoothDevices = "Bluetooth Devices";
          setTitle(strBluetoothDevices);
          
          // Set result CANCELED in case the user backs out
          setResult(Activity.RESULT_CANCELED);
          
          // Initialize the button to perform device discovery
          scanButton = (Button) findViewById(R.id.button_scan);
          String strScanDevice = getIntent().getStringExtra("scan_for_devices");
          if(strScanDevice == null) 
          	strScanDevice = "SCAN FOR DEVICES";
          scanButton.setText(strScanDevice);
          scanButton.setOnClickListener(new OnClickListener() {
              public void onClick(View v) {
                  doDiscovery();
              }
          });
  
          // Initialize array adapters. One for already paired devices 
          // and one for newly discovered devices
          int layout_text = getIntent().getIntExtra("layout_text", R.layout.device_name);
          mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, layout_text);
  
          // Find and set up the ListView for paired devices
          ListView pairedListView = (ListView) findViewById(R.id.list_devices);
          pairedListView.setAdapter(mPairedDevicesArrayAdapter);
          pairedListView.setOnItemClickListener(mDeviceClickListener);
          
          // Register for broadcasts when a device is discovered
          IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
          this.registerReceiver(mReceiver, filter);
  
          // Register for broadcasts when discovery has finished
          filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
          this.registerReceiver(mReceiver, filter);
  
          // Get the local Bluetooth adapter
          mBtAdapter = BluetoothAdapter.getDefaultAdapter();
  
          // Get a set of currently paired devices
          pairedDevices = mBtAdapter.getBondedDevices();
  
          // If there are paired devices, add each one to the ArrayAdapter
          if (pairedDevices.size() > 0) {
              for (BluetoothDevice device : pairedDevices) {
                  mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
              }
          } else {
              String noDevices = "No devices found";
              mPairedDevicesArrayAdapter.add(noDevices);
          }
      }
  
      protected void onDestroy() {
          super.onDestroy();
          // Make sure we're not doing discovery anymore
          if (mBtAdapter != null) {
              mBtAdapter.cancelDiscovery();
          }
  
          // Unregister broadcast listeners
          this.unregisterReceiver(mReceiver);
          this.finish();
      }
  
      // Start device discover with the BluetoothAdapter
  	private void doDiscovery() {
          if (D) Log.d(TAG, "doDiscovery()");
          
          // Remove all element from the list
          mPairedDevicesArrayAdapter.clear();
          
          // If there are paired devices, add each one to the ArrayAdapter
          if (pairedDevices.size() > 0) {
              for (BluetoothDevice device : pairedDevices) {
                  mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
              }
          } else {
              String strNoFound = getIntent().getStringExtra("no_devices_found");
              if(strNoFound == null) 
              	strNoFound = "No devices found";
              mPairedDevicesArrayAdapter.add(strNoFound);
          }
          
          // Indicate scanning in the title
          String strScanning = getIntent().getStringExtra("scanning");
          if(strScanning == null) 
          	strScanning = "Scanning for devices...";
          setProgressBarIndeterminateVisibility(true);
          setTitle(strScanning);
  
          // Turn on sub-title for new devices
          // findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
          // If we're already discovering, stop it
          if (mBtAdapter.isDiscovering()) {
              mBtAdapter.cancelDiscovery();
          }
  
          // Request discover from BluetoothAdapter
          mBtAdapter.startDiscovery();
      }
  
      // The on-click listener for all devices in the ListViews
      private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
          public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
              // Cancel discovery because it's costly and we're about to connect
              if(mBtAdapter.isDiscovering())
              	mBtAdapter.cancelDiscovery();
  
              String strNoFound = getIntent().getStringExtra("no_devices_found");
              if(strNoFound == null) 
              	strNoFound = "No devices found";
  	        if(!((TextView) v).getText().toString().equals(strNoFound)) {
  	            // Get the device MAC address, which is the last 17 chars in the View
  	            String info = ((TextView) v).getText().toString();
  	            String address = info.substring(info.length() - 17);
  	            
  	            // Create the result Intent and include the MAC address
  	            Intent intent = new Intent();
  	            intent.putExtra(BluetoothState.EXTRA_DEVICE_ADDRESS, address);
  	
  	            // Set result and finish this Activity
  	            setResult(Activity.RESULT_OK, intent);
  	            finish();
              }
          }
      };
  
      // The BroadcastReceiver that listens for discovered devices and
      // changes the title when discovery is finished
      private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
          public void onReceive(Context context, Intent intent) {
              String action = intent.getAction();
              
              // When discovery finds a device
              if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                  // Get the BluetoothDevice object from the Intent
                  BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                  
                  // If it's already paired, skip it, because it's been listed already
                  if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                      String strNoFound = getIntent().getStringExtra("no_devices_found");
                      if(strNoFound == null) 
                      	strNoFound = "No devices found";                    
                      
                  	if(mPairedDevicesArrayAdapter.getItem(0).equals(strNoFound)) {
                  		mPairedDevicesArrayAdapter.remove(strNoFound);
                  	}
                  	mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
                  }
                  
              // When discovery is finished, change the Activity title
              } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                  setProgressBarIndeterminateVisibility(false);
                  String strSelectDevice = getIntent().getStringExtra("select_device");
                  if(strSelectDevice == null) 
                  	strSelectDevice = "Select a device to connect";
                  setTitle(strSelectDevice);
              }
          }
      };
  
  }
  